<template>
    <div class="todo-header">
        <input type="text" placeholder="请输入你的任务名称，按回车键确认" v-model="title" @keyup.enter="add"/>
    </div>
</template>

<script>
import {nanoid} from 'nanoid'
    export default {
        name:'my-header',
        props:['receive'],
        data(){
            return{
                title:''
            }
            
        },
        methods:{
            add(){
                if(!this.title.trim()) return alert('输入不能为空')
                //将用户的输入包装成为todo对象
                //uuid:能够生成不会重复的序列号
                //nanoid
                //将用户的输入包装为一个对象
                const todoObj={id:nanoid(),title:this.title,done:false}
                this.receive(todoObj)
                this.title=''
            }
        }
        
    }
</script>

<style scoped>
    /*header*/
	.todo-header input {
		width: 560px;
		height: 28px;
		font-size: 14px;
		border: 1px solid #ccc;
		border-radius: 4px;
		padding: 4px 7px;
	}
	
	.todo-header input:focus {
		outline: none;
		border-color: rgba(82, 168, 236, 0.8);
		box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
	}
</style>